// Copyright 2018 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package pagetables

import (
	"unsafe"

	"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
)

// PTEs returns aligned PTE entries.
func (n *Node) PTEs() *PTEs {
	addr := uintptr(unsafe.Pointer(&n.unalignedData[0]))
	offset := addr & (usermem.PageSize - 1)
	if offset != 0 {
		offset = usermem.PageSize - offset
	}
	return (*PTEs)(unsafe.Pointer(addr + offset))
}
